50 dollars wow, the I have is a crapola pro mag you can not feel the adjustments click or hear the click with that sight. I just gave my eotech away and put the carrying handle back on but now I know to look for a matech, that is what a majority of m4s have on them army wide. Thank you for the websites I am allready a member of m4carbine.net dont really care for "barfcom"